Hi List ! I narrowed down my previous Problem about beeing unable to draw exact RGB device values... The core problem is that i cannot really use native (CGContext) drawing in Qt5 ! (Where it was working fine in Qt4).
When i show the Qwidget subclass containing my paintEvent there is a short flicker where i can see my CGContext drawings ( 2 to three times) until finally i can only see a QWidget background. So i know i draw things but its somehow not persistent /overwritten. What i am doing: ---> I create a QWidget subclass and implement a paintEvent method. Here is a shortened paintEvent method: void nativePainter::paintEvent(QPaintEvent* e) { QPainter painter; painter.begin(this); painter.beginNativePainting(); //creating a CGImageRef and put some Bitmap in it ... //until here CGContextRef context = QtMac::currentCGContext(); CGContextDrawImage(context, cgrect, iref); CGContextFlush(context); //end painting painter.endNativePainting(); painter.end(); } You can get a full sample that shows the effect here: http://qt-project.org/forums/viewthread/49751/ Is there someone who can help me out on this one ? Is it a Qt5 Bug ? Greetings, Nils _______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest